| 1 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 2 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Dec 2025 |
| 3 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 4 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 5 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 6 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 7 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 8 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 9 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 10 | Maroon Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2025 |
| 11 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 12 | Marshco Production LLC | Colorado City, TX 79512 | Oil Operator | Dec 2025 |
| 13 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 14 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 15 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 16 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 17 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Dec 2025 |
| 18 | McAlester Fuel Co. | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 19 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 20 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 21 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 22 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 23 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 24 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 25 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Dec 2025 |
| 26 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 27 | McShane, J. Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2004 |
| 28 | MDC Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2022 |
| 29 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 30 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 31 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 32 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 33 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 34 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 35 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 36 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 37 | Midland Res. Oper. Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1998 |
| 38 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 39 | Midway Energy Partners Operating LLC | Midland, TX 79701 | Oil Operator | Dec 2025 |
| 40 | Millennium Resources, LLC. | Big Lake, TX 76932 | Oil & Gas Operator | Sep 2012 |
| 41 | Millennium Resources, LP | Midland, TX 79708 | Oil Operator | Dec 2025 |
| 42 | Millwee Oil, Inc. | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 43 | Miltex Oil Company | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 44 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2025 |
| 45 | Minuja Oil And Gas LLC | Corpus Christi, TX 78401 | Oil & Gas Operator | Sep 1996 |
| 46 | Miranda Energy Corporation | Midland, TX 79705 | Oil & Gas Operator | Jun 2016 |
| 47 | Mission Exploration, Inc. | Fate, TX 75132 | Oil & Gas Operator | Dec 1987 |
| 48 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 2007 |
| 49 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 50 | Modern Exploration, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Dec 2025 |
| 51 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 52 | Momentum Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 53 | Momentum Oil Company | Albany, TX 76430 | Oil & Gas Operator | May 2003 |
| 54 | Moody Oil & Gas Co. | Bridgeport, WV 26330-1051 | Oil & Gas Operator | Dec 2004 |
| 55 | Moriah Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 56 | Morris Operating Co | Lovington, NM 88260 | Oil & Gas Operator | Dec 2025 |
| 57 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Dec 2025 |
| 58 | MSD Operating, LLC | Big Spring, TX 79721 | Oil & Gas Operator | Dec 2025 |
| 59 | Mule Kick Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 60 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 61 | Munn, W. H. Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2002 |
| 62 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Aug 2025 |
| 63 | Murchison Oil And Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 64 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 65 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 66 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Dec 2025 |